[patrickas]

It seems to me he is just manipulating the DCS of the SMS being sent. This is standard behavior according to the GSM SMS specs.

http://www.etsi.org/deliver/etsi_gts/03/0338/05.00.00_60/gsm...

From section 4, "SMS Data Coding Scheme" can be used to control "Voicemail Message Waiting" among other indicators and to send messages of "Class 0" which instruct the phone to shall "display the message immediately and send an acknowledgement to the SC when the message has successfully reached the MS irrespective of whether there is memory available in the SIM or ME."

Admittedly it has been over a decade since I last played with sending such messages to phones, but it did seem to me like a bug in the spec, giving too much control to anyone with access to an sms-c (or any other mean to change the DCS field). Back then all phones I tested had implemented the spec as described.

[orjan]

Interesting. Then that would mean that not only iPhone will be affected by this. Would be nice to see the code.